Ultrahigh-frequency electron discharge device



July 15, 1952 F. D. GOODCHILD ,6

ULTRAHIGH-FREQUENCY ELECTRON DISCHARGE DEVICE Original Filed Sept. 9, 1942 2 SHEETSSHEET l INVENTORS F/PflA/K 0006246 60000010 A TTOP/VE) July 15, 1952 F. 0. GOODCHILD 2,603,762

- ULTRAHIGH-FREQUENCY ELECTRON DISCHARGE DEVICE Original Filed Sept. 9, 1942 2 SPEETSr-SHEET 2 A TTORNE') Patented July 15, 1952 UNITED] A STATE PAT'ENT'YTII OFF CE- i I ULTRAHIG'HJREQUENCY' ELECTRON v Frank'Douglas Goodchild, London, England, assigner to International Standard Electric Corporation, New York, N. Y., ajcorporation of Delaware Original application September 9, 1942. serial No.

February 14, 1 941 I 4"C laims.

This application is a division-of the application Serial No. 457,795, now Patent No. 2,451,328, filed September 9, 1942, by applicant jointly with C. H. Foulkes now converted to a sole application of said C. H. Foulkes; and relates to electron discharge devices and more particularly tosuch devices of the kind embodying hollow resonators, as for example, electron discharge devices employing velocity modulation of an electron stream. v

An object of the invention is the provision of a simple construction of a mount for the electrodes and the resonator for such devices.

According to one aspect of the invention an ultra high-frequency electron discharge device comprises a resonator arranged so that its axis is parallel to the major axis of the bulb and mounted upon a metal platform secured to a plurality of pins fused into a dished glass base onto which the bulb is sealed. 7

One embodiment of the manner in which the invention is carried out will be described with reference to an electron velocity-modulated device of the kind described in United States Patent No. 2,320,860, dated June 1, 1943, inwh'ich the hollow resonator comprises a short "length of coaxial line.

In the accompanying drawings:

Figure 1 is a perspective view of the assembled resonator tube and its associated socket;

Figure 2 is a vertical section through the centre of assembly and Divided and this application-August 10, 1948, Serial No. 43,382.

In Great, Britain h permit the. fsh 0 to..., 19ct d fi the baseand' assists in dispersing the heat which is; generated. The triangular plate 12 also has cut in it three slots 21' to enable it to take up any strains which may be caused by unequal expansion of the glass and copper. The anode 8,the collector plate 24, the grid 28 and the cathode 29 are mounted upon rods I3 which pass through the mica insulators i4 and I5 and through mica spacing plates Hi. The remaining pins H in the base are'used for connections to the electrodes.

The hole 5, Fig. 2, provides communication between the resonator and the glass tube l! which is sealed into the bulb l0 adjacent the hole 5; Conductors 18 for extracting energy from the resonator extend through the tube I1 and are sealed thereto at l9. v I

When the valve is plugged into its socket 20, the three pins H which support the triangular platform or plate l2 engage in holes drilled in a substantial metal spider 2| fixed to the socket. The remaining pins engage contact terminals 22 on the socket in the usual manner. The socket 20 is provided with a central hole 33 having a key- Way 34 into which the protruding metal spigot containing the sealing off tube of the glass bulb l0 extends; This spigot has a key which engages with the key-way 34 so as to ensure that the pins H make contact with the, proper terminals 22 of the socket.

The invention is not limited to the precise con- ',struction described and modifications coming Figure 3 is a plan of the base at a'section taken on the line 33 of Figure 2.

Figures 1 and 2 show how the resonator and its associated electrodes are mounted so that its axis is parallel to the major axis of the enclosing bulb, on a base of the kind comprising a dished glass member 9, the peripheral lip of the member 9 is fused to a lip on the lower end of the enclosing glass bulb I0. Contact pins ll aresealed directly into the dished member 9. The inner conductor ofthe resonator is made up of two copper rods 30 and. 3|, each having one end i spread out into a head of mushroom form. The

small ends of the rods support an assembly of fins 32 which defines the slot through which the electron stream is fired. The outer conductor 35 is fixed at both ends to the mushroom heads of therods.

within the scope of the appended claims will occur to those versed in the art. For example, the outer conductor of the resonator may be built up from three or more curved sections of suitable shape.

What is claimed is: 1. An. ultra high frequency electron discharge tube comprising. an elongated envelope'having a glass base at one'end thereof, a plurality of pins fused throughsaid base, a metal platform secured to said pins, a resonator having a center conductor structure mounted upon said metal platform, electrodes disposed adjacent'said res onator in said envelope, insulated means carried by said. centerconductor structure for supporting said electrodes adjacent said resonator, and

The resonator is mounted-upon a triangular copper plate l2 by means of a copper rod 25 screwed into the head 01' the rod 30, the-washer 26 providing the necessary spa cing'. The plate I 2 is spot welded to three-gf'the base'p'ins' H.

saidplatform having slots therein extending in wardly from its edges to enable itto take up any strains which maybe caused byunequal expansion of saidenvelope and of .said pins.

2, An ultra high frequency electron discharge tube comprising an elongated'envelop'e having a,

I glass base at one end thereof, ,a plurality of pins fused through said base, a metal platform having slots therein extending inwardly from its edges, said platform being secured to said pins, each of said slots being disposed adjacent one of said pins and crosswise .of a radial line drawn from the center of said platform through'the pin adjacent such slot, aresonator mounted upon said metal platform and having its axis parallel to the major axis of said envelope and electrodes-*disi posedadjacent said resonator in said envelope.

3. An ultra high frequency electron discharge tube comprising an elongatedrenvelopeshaving a said base, a triangular metal platform secured at its corners to three of said pins, said platform having a slot disposed adjacent eachlof said three pins and extending from the edge of the platform across a line drawn throughthe'center of said glass base at one end thereof, pins fused through v platform and the pin adjacent such slot, a res- J 4. An ultra high frequency electron discharge tube comprising an elongated envelope having a dished glass base at one end thereof, a plurality of pinsfused through said base; a metal platform secured to said pins, a resonator mounted upon said metal platform and having its axis parallel to the major axis of said envelope, insulating discs mounted on said resonator at its respective ends,, rods secured at each end in said insulating discs, and. electrodes mounted on said rods.

: DOUGLAS GOOEDC'I-IILD.

REFERENCES- CITED The following references are of record in the fileof this patent;

V v (UNITED-ESTATES PATENTS Number Name Date 2226;680 Wheeler Dec. 31,1940 2,398,608 Werner et. a1 Apr. 16, 1946 2,411,538 G-oodchild NOV. 26, 1946 r 

